/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Sampling/MeshBakerCommon.h
Compute interpolated UV value inside triangle using barycentric coordinates
true if a valid UV was returned, false otherwise
virtual bool TriBaryInterpolateUV ( const void * Mesh, const int32 TriId, const FVector3d & BaryCoords, const int UVLayer, FVector2f & UVOut ) const